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Tube-in-Tube TiO2 Nanotubes with Porous Walls: Fabrication, Formation Mechanism, and Photocatalytic Properties

Authors

  • Xijin Xu,

    Corresponding author
    1. International Center for Young Scientists (ICYS) and International, Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1–1, Tsukuba, Ibaraki 305–0044, Japan
    2. Environmental Futures Centre and Griffith School of Environment, Gold Coast Campus, Griffith University, QLD 4222, Australia
    • International Center for Young Scientists (ICYS) and International, Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1–1, Tsukuba, Ibaraki 305–0044, Japan.
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  • Xiaosheng Fang,

    1. International Center for Young Scientists (ICYS) and International, Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1–1, Tsukuba, Ibaraki 305–0044, Japan
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  • Tianyou Zhai,

    Corresponding author
    1. International Center for Young Scientists (ICYS) and International, Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1–1, Tsukuba, Ibaraki 305–0044, Japan
    • International Center for Young Scientists (ICYS) and International, Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1–1, Tsukuba, Ibaraki 305–0044, Japan.
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  • Haibo Zeng,

    Corresponding author
    1. International Center for Young Scientists (ICYS) and International, Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1–1, Tsukuba, Ibaraki 305–0044, Japan
    • International Center for Young Scientists (ICYS) and International, Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1–1, Tsukuba, Ibaraki 305–0044, Japan.
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  • Baodan Liu,

    1. International Center for Young Scientists (ICYS) and International, Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1–1, Tsukuba, Ibaraki 305–0044, Japan
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  • Xiaoye Hu,

    1. Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanostructures, Institute of Solid State Physics, Chinese Academy of Sciences, P.O. Box 1129, Hefei 230031, China
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  • Yoshio Bando,

    1. International Center for Young Scientists (ICYS) and International, Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1–1, Tsukuba, Ibaraki 305–0044, Japan
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  • Dmitri Golberg

    Corresponding author
    1. International Center for Young Scientists (ICYS) and International, Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1–1, Tsukuba, Ibaraki 305–0044, Japan
    • International Center for Young Scientists (ICYS) and International, Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1–1, Tsukuba, Ibaraki 305–0044, Japan.
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Abstract

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Self-organized, freestanding TiO2 nanotube arrays that exhibit tube-in-tube morphology are fabricated using a one-step anodic method. These arrays are uniform and compact. The tubes within the arrays are several micrometers long with a 200 nm outer diameter. They have a coarse lateral profile that leads to a large aspect ratio and guarantees good photocatalytic properties.

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